Virtual IPs in a zone (two interfaces in a zone, but only one real NIC)

Question

Hello,
I would like to give Solaris10 zones a try for our project development, where I need to simulate a network of computers:
C1 <----> C2I1 C2I2 <---> C3
i.e. machines C1 and C3 does have one NIC and machine C1 does have two NICs connected to C1 and C3. On C2 there will be running our testing application firewall software, hence this configuration.
Now the question is: I have amd64/solaris10 box with only one NIC available. Is it possible to use some kind of virtual network device (like dummy0 in linux) in solaris to simulate a needed interface? Or is it simply possible to configure one zone (C2) with two independed IPs bound to one NIC?
In my example zones will simulate all three: C1, C2 and C3 machines and the issue come from C2 zone configuration.
Thanks!
Karel

Answer 1

Hello,
I would like to give Solaris10 zones a try for our
project development, where I need to simulate a
network of computers:
C1 <----> C2I1 C2I2 <---> C3
i.e. machines C1 and C3 does have one NIC andmachine
C1 does have two NICs connected to C1 and C3. OnC2
there will be running our testing application
firewall software, hence this configuration.I assume you mean C2 has two NICs?True! My mistake.
Now the question is: I have amd64/solaris10 boxwith
only one NIC available. Is it possible to use some
kind of virtual network device (like dummy0 inlinux)
in solaris to simulate a needed interface? Or isit
simply possible to configure one zone (C2) withtwo
independed IPs bound to one NIC?Yes. If you're doing it by hand, you add a colon and
an instance number to the physical interface. So if
the interface is hme0, a virtual interface could be
hme0:1.
If you're using zones, then you just need to
configure a new IP address and the physical interface
to use.Nice!
In my example zones will simulate all three: C1,C2
and C3 machines and the issue come from C2 zone
configuration.Then it doesn't matter how many NICs you have. None
of the traffic will hit the network. It'll all be
done via loopback drivers.Do you mean I should use lo0 device for zones or that just using hme0 will results in optimization of trafic on localhost so that it will not hit wire?
Thanks!
Karel